/*
 * Created on 29/12/2004
 * Created by Paul Duran
 * Copyright (C) 2004 Aelitis, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * AELITIS, SARL au capital de 30,000 euros
 * 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
 *
 */

package org.gudy.azureus2.ui.console.commands;

import java.util.Iterator;
import java.util.List;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.gudy.azureus2.ui.console.ConsoleInput;

/**
 * the alias command will add/remove/modify aliases to the CLI input reader. aliases will be expanded and take priority over standard commands.
 * 
 * @author pauld
 */
public class Alias extends OptionsConsoleCommand {

    /**
     * @param _commandNames
     */
    public Alias() {
        super("alias");
        getOptions().addOption(new Option("d", "delete", false, "delete the specified alias"));
    }

    /*
     * (non-Javadoc)
     * @see org.gudy.azureus2.ui.console.commands.IConsoleCommand#getCommandDescriptions()
     */
    public String getCommandDescriptions() {
        return "alias [-d] [aliasname] [arguments...]\tadd/modify/delete aliases. use with no argument to show existing aliases";
    }

    /*
     * (non-Javadoc)
     * @see org.gudy.azureus2.ui.console.commands.OptionsConsoleCommand#execute(java.lang.String, org.gudy.azureus2.ui.console.ConsoleInput,
     * org.apache.commons.cli.CommandLine)
     */
    public void execute(String commandName, ConsoleInput console, CommandLine commandLine) {

        List args = commandLine.getArgList();
        if (args.isEmpty()) {
            if (commandLine.hasOption('d'))
                console.out.println(commandName + " --delete requires the name of an alias to remove");
            else
                printAliases(console);
            return;
        }
        if (commandLine.hasOption('d'))
            deleteAlias(console, (String) args.get(0));
        else {
            String aliasName = (String) args.remove(0);
            if (args.isEmpty()) {
                printAlias(console, aliasName);
            } else
                addAlias(console, aliasName, args);
        }
    }

    /**
     * @param aliasName
     */
    private void printAlias(ConsoleInput ci, String aliasName) {
        String aliasText = (String) ci.aliases.get(aliasName);
        if (aliasText == null) {
            ci.out.println("> Error: Alias '" + aliasName + "' does not exist");
        } else {
            ci.out.println("> " + aliasName + "=" + aliasText);
        }
    }

    /**
     * @param object
     */
    private void deleteAlias(ConsoleInput ci, String aliasName) {
        // ci.out.println("removing alias: " + aliasName);
        if (ci.aliases.remove(aliasName) == null) {
            ci.out.println("> Error: Alias '" + aliasName + "' does not exist");
        } else {
            ci.out.println("> Alias: '" + aliasName + "' deleted");
            ci.saveAliases();
        }
    }

    /**
     * @param object
     * @param argList
     */
    private void addAlias(ConsoleInput ci, String aliasName, List argList) {
        // ci.out.println("adding alias: " + aliasName);
        StringBuffer aliasText = new StringBuffer();
        for (Iterator iter = argList.iterator(); iter.hasNext();) {
            String arg = (String) iter.next();
            if (arg.indexOf(" ") != -1)
                aliasText.append("\"").append(arg).append("\"");
            else
                aliasText.append(arg);
            aliasText.append(" ");
        }
        ci.aliases.put(aliasName, aliasText.toString());
        ci.saveAliases();
        printAlias(ci, aliasName);
    }

    /**
     * prints out a list of all the aliases
     * 
     * @param out
     */
    private void printAliases(ConsoleInput ci) {
        for (Iterator iter = ci.aliases.keySet().iterator(); iter.hasNext();) {
            String aliasName = (String) iter.next();
            printAlias(ci, aliasName);
        }
    }

}
